Synthesis of magnetic nano-particles by Microwave hydrothermal Method

• Main Authors: Hung-Chang Liu, 劉宏昌
• Other Authors: Hong-Wen Wang
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/29740681738410419302

碩士 === 中原大學 === 化學研究所 === 94 === Prepartions of nanoparticles could be classified into three categories .The first is “Laser ablation method” the second is “metal vapor synthesis method”; and the third is “chemical solution method”. In the present study, synthesis of Fe3O4 magnetic nanoparticles is carried out by microwave hydrothermal method. Iron chloride tetrahydrate (FeCl2．4H2O) and Iron chloride hexahydrate (FeCl3．6H2O) have been used for precipitation by using ammonium hydroxide solution (NH4OH). It is to change solution’s concentration to controlling size of Fe3O4 magnetic nanoparticles. In the produce, Iron chloride tetrahydrate and Iron chloride hexahydrate must be in 1:2 mol ratio for the formation of Fe3O4 phase. The reaction temperature is 120℃ and 180℃. Particle size of Fe3O4 nanoparticle can be controlled by change the concentration of solution. Fe3O4 with particle size of 10nm, 15~20nm were obtained by using 0.075M and 0.3~0.45M starting precursors. DLS can not precisely measure the particle size of Fe3O4 due to the agglomeration problem.